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ampeg_attack

EG attack time.

Examples #

ampeg_attack=1.2
fileg_attack=0.1

These are very frequently used, especially with amplifier envelopes. ampeg_attack is the standard “A” in the basic ADSR volume envelope. fileg_attack is key to 303-style basses.

In ARIA, the SFZ1 envelopes have linear attack (for pitcheg and fileg, probably linear in cents, which won’t translate into linear in Hertz). Decay and release stages have a curve which is faster than linear, and it seems to match “well enough” with a multiplicatively decreasing curve. The step size should be close to where is the decay duration in seconds, and is the sample rate in Hertz. The envelope at index is thus computed as

Here is a screenshot of a file output using Sforzando, showing the ampeg_envelope shape and its stages.

DAHDSR envelope shape image

Name Version Type Default RangeUnit
ampeg_attack SFZ v1 float 0 0 to 100seconds
ampeg_attackccN SFZ v1 float 0 -100 to 100seconds
ampeg_vel2attack SFZ v1 float 0 -100 to 100seconds

Modulation Sources

  • Envelope: X
  • LFO: X
  • MIDI CC:
    • ampeg_attackccN (SFZ v1), alias ampeg_attack_onccN (SFZ v2)
  • Velocity:
    • ampeg_vel2attack (SFZ v1)

Category: Modulation, Envelope Generators